Messages in this thread | | | Subject | Re: [PATCH 03/27] Enforce module signatures if the kernel is locked down | From | Mimi Zohar <> | Date | Mon, 30 Oct 2017 13:52:16 -0400 |
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[Corrected Matthew Garrett's email address. Cc'ed Bruno Meneguele]
On Mon, 2017-10-30 at 17:00 +0000, David Howells wrote: > Mimi Zohar <zohar@linux.vnet.ibm.com> wrote: > > > This kernel_is_locked_down() check is being called for both the > > original and new module_load syscalls. We need to be able > > differentiate them. This is fine for the original syscall, but for > > the new syscall we would need an additional IMA check - > > !is_ima_appraise_enabled(). > > IMA can only be used with finit_module()?
Yes, without the file descriptor, IMA-appraisal can't access the xattrs.
You should really look at Bruno's patches, which are in my next branch:
8168913c50d5 "ima: check signature enforcement against cmdline param instead of CONFIG" 404090509894 module: export module signature enforcement status
Can we get an Ack on the module one?
Mimi
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